Mitsubishi Electric MELSEC iQ-F Series User Manual page 44

DNS setting change function
The DNS setting change function changes the DNS settings of the Ethernet module by setting the IP addresses of DNS
servers from a peripheral to the buffer memory and turning on 'DNS setting storage area write request' (Un\G4398).
The IP addresses of DNS servers can be changed without the engineering tool.
When the DNS setting change function is used, instead of the DNS settings configured with the module parameters in the
engineering tool, the IP addresses of the DNS servers stored in the DNS setting storage area are set to the Ethernet module.
In addition, turning on 'DNS setting storage area clear request' (Un\G4400) can enable the DNS settings configured with the
module parameters in the engineering tool to become active again.
(1)
Un\G4390
DNS server 1
Un\G4391 address
Un\G4392
DNS server 2
address
Un\G4393
Un\G4394
DNS server 3
address
Un\G4395
Un\G4396
DNS server 4
address
Un\G4397
Peripheral
(4)
(1) Use the device write operation to store IP addresses of the DNS servers in the buffer memory.
(2) Turn on 'DNS setting storage area write request' (Un\G4398), which causes the IP addresses of the DNS servers in the buffer memory to be stored in the
DNS setting storage area.
(3) Power off and on the system or reset the CPU module.
(4) The DNS settings stored in the DNS setting storage area are used for operation.
4 FUNCTION LIST
42
4.3 Other Functions
Ethernet communications/
Serial communications
(RS-485/422/232)
Un\G4390
DNS server 1
Un\G4391 address
Un\G4392
DNS server 2
address
Un\G4393
Un\G4394
DNS server 3
address
Un\G4395
Un\G4396
DNS server 4
address
Un\G4397
(2)
Buffer memory
Un\G4390
DNS server 1
Un\G4391 address
Un\G4392
DNS server 2
address
Un\G4393
Un\G4394
DNS server 3
address
Un\G4395
Un\G4396
DNS server 4
address
Un\G4397
CPU module and
Ethernet module
(3)
DNS setting
storage area
DNS server 1
address
DNS server 2
address
DNS server 3
Turn on
address
Un\G4398.
DNS server 4
address